Home / 13,459.79-20,198.10-5,140.55

Finding the Fourth Proportional to 13,459.79, 20,198.10 and 5,140.55

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Solution

The fourth proportional to 13,459.79, 20,198.10 and 5,140.55 is: 7,714.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,459.79 : 20,198.10 = 5,140.55 : x
  2. Step 2: Convert to fraction form
    13,459.79/20,198.10 = 5,140.55/x
  3. Step 3: Cross multiply
    13,459.79x = 20,198.10 × 5,140.55
  4. Step 4: Simplify right side
    13,459.79x = 103,829,342.96
  5. Step 5: Solve for x
    x = 103,829,342.96/13,459.79
  6. Step 6: Final answer
    x = 7,714.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.